Optical fiber connector

• US 4,045,121 A
• Filed: 01/22/1976
• Issued: 08/30/1977
• Est. Priority Date: 01/22/1976
• Status: Expired due to Term

• Current Assignee: The Deutsch Company Electronic Components Division
• Original Assignee: The Deutsch Company Electronic Components Division
• Inventors: Clark, Kenneth M.
• Primary Examiner(s): Corbin, John K.
• Assistant Examiner(s): Levy, Stewart
• Application Number:
  US05/651,285
• Time in Patent Office: 586 Days
• Field of Search: 350/96 C, 350/96 B, 350/96 WG
• US Class Current: 385/58
• CPC Class Codes: G02B 6/3805 with a fibre-supporting member inclined to the bottom surface of the alignment means
• CPC Class Codes: G02B 6/3839 for a plurality of light guides
• CPC Class Codes: G02B 6/3878 comprising a plurality of ferrules, branching and break-out means
• CPC Class Codes: G02B 6/3885 Multicore or multichannel optical connectors, i.e. one single ferrule containing more than one fibre, e.g. ribbon type optical ribbon cable G02B6/4403, G02B6/448
• CPC Class Codes: G02B 6/3888 Protection from over-extension or over-compression

Abstract

This invention provides a connector for optical fibers which includes two connector sections each of which has a means for holding an optical fiber, one of the sections having an inclined surface engaged by the end portions of both of the fibers where their end faces abut. One of the fibers is bent to its position of engagement with the inclined surface as held in one section of the connector. The other of the optical fiber is bent by the inclined surface as the two connector sections are brought together to a mated position.

Claims

1. An optical waveguide connector comprising

a first element having an inclined surface means,

a second element,

at least one first optical fiber having resilience,

means on said first element for holding said first optical fiber with an end portion thereof on said inclined surface means,

at least one second optical fiber having resilience,

means on said second element for holding said second optical fiber so as to have an outwardly facing end portion,

and means for aligning said first and second elements such that said end portion of said second optical fiber is at an angle to said inclined surface means and upon relative advancement of said first and second elements toward each other said end portion of said second optical fiber is caused to engage said inclined surface means and be bent thereby so as to slide therealong to a location where the end thereof engages the end of said first optical fiber.

2. In combination with at least one first optical fiber having resilience, and at least one second optical fiber having resilience, a device for connecting said first optical fiber to said second optical fiber for transmitting light therebetween comprising

a first element including

means for holding said first optical fiber so as to extend in a first direction,

said first optical fiber having an end portion extending beyond said means for holding said first optical fiber,

a surface inclined relative to said first direction,

and positioning means for positioning said end portion of said first optical fiber so as to lie along said inclined surface with the outer end of said first optical fiber at an intermediate portion of said inclined surface,

said positioning means including means for bending said first optical fiber so that said end portion thereof exerts a lateral force against said inclined surface,

a second element having a forward end, said second element including,

means for holding said second optical fiber so as to extend in said first direction,

said second optical fiber having an end portion extending beyond said means for holding said second optical fiber and projecting beyond said forward end of said second element,

said first and second elements having a mated position in which said end portion of said second optical fiber lies along said inclined surface and is bent thereby so that said second optical fiber exerts a lateral force against said inclined surface, and the outer end of said second optical fiber abuts said outer end of said first optical fiber,

and releasable connecting means for holding said first and second elements in said mated position and permitting said first and second elements to be moved away from each other to a separated condition upon release of said releasable connecting means.

3. An optical waveguide connector comprising

a first element having an inclined surface means,

a second element,

a plurality of first optical fibers having resilience,

means on said first element for holding said first optical fibers in spaced parallelism with end portions thereof on said inclined surface means,

said means for holding said first optical fibers including means for bending said first optical fibers so that said first optical fibers exert a resilient force urging the same against said inclined surface means,

a plurality of second optical fibers having resilience,

means on said second element for holding said second optical fibers in spaced parallelism so as to have a spacing therebetween substantially equal to the spacing of said first optical fibers, and to have outwardly facing end portions,

and means for aligning said first and second elements including means for positioning the end portions of said second optical fibers at an angle relative to said inclined surface means such that upon relative advancement of said first and second elements toward each other said second optical fibers are caused to engage said inclined surface means and be bent thereby and exert a force against said inclined surface means to produce intimate contact therewith and along said inclined surface means to a location where the ends thereof engage the ends of said first optical fibers,

said second element including,

an outwardly projecting portion engaging and supporting said end portions of said second optical fibers,

said outwardly projecting portion being engageable with said first element upon said relative advancement of said first and second elements toward each other for pushing said outwardly projecting portion inwardly so as to enable said second optical fibers to so engage said inclined surface means.

4. A device as recited in claim 3 in which said projecting portion includes guide means for holding the end portions of said second optical fibers in spaced parallelism.

5. A device as recited in claim 4 including resilient means biasing said projecting portion outwardly, said projecting portion being so movable inwardly in opposition to said resilient means when said first and second elements are so advanced relatively toward each other.

6. An optical waveguide connector comprising

a first element having an inclined surface means,

a second element,

a plurality of first optical fibers having resilience,

means on said first element for holding said first optical fibers in spaced parallelism with end portions thereof on said inclined surface means,

a plurality of second optical fibers having resilience,

means on said second element for holding said second optical fibers in spaced parallelism so as to have a spacing therebetween substantially equal to the spacing of said first optical fibers, and to have outwardly facing end portions,

and means for aligning said first and second elements including means for positioning the end portions of said second optical fibers at an angle relative to said inclined surface means such that upon relative advancement of said first and second elements toward each other said second optical fibers are caused to engage said inclined surface means and be bent thereby and exert a force against said inclined surface means to produce intimate contact therewith and so as to slide along said inclined surface means to a location where the ends thereof engage the ends of said first optical fibers.

7. A device as recited in claim 6 in which said means for holding said first optical fibers includes means for bending said first optical fibers so that said first optical fibers exert a resilient force urging the same against said inclined surface means.

8. A device as recited in claim 7 including in addition means movable downwardly against the end portions of said first and second fibers upon said relative advancement of said first and second elements for holding said first and second fibers in alignment in said grooves.

9. A device as recited in claim 7 in which

said inclined surface means is provided with a plurality of grooves therein,

said first optical fibers lying in said grooves,

and said aligning means includes means for aligning said second optical fibers with said grooves for entering the same to engage said first optical fibers upon said relative advancement of said first and second elements.

10. A device as recited in claim 7 in which

said means for positioning said first optical fibers includes means for permitting limited axial displacement of said first optical fibers relative to said inclined surface means,

and said holding means for said first optical fibers and said holding means for said second optical fibers include means for positioning the ends of said first and said second optical fibers such that upon said relative advancement of said first and second elements and said engagement of said ends of said optical fibers said first optical fibers are displaced by said second optical fibers so as to move relative to said inclined surface means for assuring intimate contact of the end surfaces of said first and second optical fibers.

11. A device as recited in claim 10 in which for permitting said relative axial displacement of said first optical fibers and said inclined surface means,

said first element includes

means remote from said inclined surface means for gripping said first optical fibers, and defines an open space intermediate said gripping means and said inclined surface means for permitting flexure of said optical fibers in said open space upon such displacement of said first optical fibers.

12. A device as recited in claim 11 in which said means for holding said second optical fibers includes means for precluding substantial movement of said second optical fibers relative to said second element at a location inwardly of said outer end portions of said second optical fibers.

13. In combination with a first optical fiber cable having a plurality of first optical fibers having resilience, and a second optical fiber cable having a plurality of second optical fibers having resilience, a device for connecting said first optical fibers to said second optical fibers to transmitting light therebetween comprising

a first element, said first element including

means for holding an end portion of said first cable with the axis thereof extending in a first direction,

said first optical fibers having end portions extending beyond the end portion of said first cable,

a surface inclined relative to said first direction,

and positioning means for positioning said end portions of said first optical fibers with the outer parts thereof lying along said inclined surface and the outer ends of said first optical fibers at an intermediate portion of said inclined surface,

said positioning means including means for bending said first optical fibers so that said end portions thereof exert a lateral force against said inclined surface,

a second element having a forward end, said second element including

means for holding an end portion of said second cable with the axis thereof extending substantially in said first direction, said second optical fibers having end portions extending beyond said end portion of said second cable,

and positioning means for positioning said second optical fibers so that the outer parts of said end portions of said second optical fibers project beyond said forward end of said second element,

said first and second elements having a mated position in which said outer parts of said second optical fibers lie along said inclined surface and are bent thereby so that said second optical fibers exert a lateral force against said inclined surface, and the outer ends of said second optical fibers abut said outer ends of said first optical fibers,

and releasable connecting means for holding said first and second elements in said mated position and permitting said first and second elements to be moved away from each other to a separated condition upon release of said releasable connecting means.

14. A device as recited in claim 13 in which said positioning means for said first optical fibers and said positioning means for said second optical fibers include means for causing said outer ends of said first and second optical fibers to exert axial compressive forces against each other for assuring intimate contact between said outer ends of said first and second optical fibers.

15. A device as recited in claim 13 in which said means for bending said first optical fibers includes means for bending said first optical fibers in one direction adjacent said first cable, and means for bending said first optical fibers in the opposite direction adjacent said inclined surface.

16. A device as recited in claim 13 in which said positioning means for at least one of said first and second optical fibers includes means for permitting axial movement of the optical fibers associated therewith upon engagement of said outer ends of said first and said second optical fibers when said first and said said second elements are brought to said mated position.

17. A device as recited in claim 13 in which said inclined surface includes a plurality of grooves therein, said end portions of said first and said second optical fibers being in said grooves and bearing against the walls thereof.

18. A device as recited in claim 17 in which said means for bending said first optical fibers includes

a first transverse member extending transversely of said first optical fibers,

said member including a plurality of recesses having a predetermined spacing therebetween,

one of said first optical fibers being received in each of said recesses for thereby giving said first optical fibers a predetermined spacing,

said member at each of said recesses exerting a lateral force against said optical fiber therein for bending the same.

19. A device as recited in claim 18 in which said means for bending said first optical fibers includes

a second transverse member extending transversely of said first optical fibers,

said first optical fibers extending around one side of said second transverse member and around the opposite side of said first transverse member.

20. A device as recited in claim 19 in which said first element includes a clamping means for holding said first optical fibers between said second transverse member and said end portion of said first cable.

21. A device as recited in claim 20 in which

said first optical fibers are so held by said clamping means that they are substantially in the plane of said axis of said first cable,

and said second transverse member is laterally displaced from said axis so that said first optical fibers are bent laterally between said clamping means and said second transverse member,

said first optical fibers being bent laterally in the opposite direction between said second transverse member and said inclined surface.

22. A device as recited in claim 19 in which said first element includes fiber aligning means between said second transverse member and said means for holding said first cable,

said fiber aligning means of said first element including a plurality of guide means each of which is aligned with one of said recesses of said first transverse member and receives one of said first optical fibers, and a clamp means holding said first optical fibers adjacent said fiber aligning means.

23. A device as recited in claim 13 in which said second element includes

support means for engaging said second optical fibers adjacent said end portions thereof,

and means for extending said support means forwardly relative to said second element when said first and said second elements are moved from said mated position to said separated condition, whereby said support means can support said second optical fibers.

24. A device as recited in claim 23 in which said support means includes

a member extending transversely of said second element,

and a plurality of aperture means in said member,

each of said aperture means receiving one of said second optical fibers.

25. A device as recited in claim 22 in which said second element includes

fiber aligning means between said member and said means for holding said second cable,

said fiber aligning means including a plurality of guide means each of which is aligned with one of said aperture means and receives one of said second optical fibers,

and a clamp means holding said second optical fibers adjacent said fiber aligning means.

26. A device as recited in claim 24 in which said aperture means are notches.

27. A device as recited in claim 26 in which

said means for extending said support means includes a spring biasing said support means forwardly relative to said second element,

and including means for limiting the forward movement of said support means.

28. A device as recited in claim 13 including in addition a clamp means engaging said end portions of said first and said second optical fibers for holding the same in said groove means.

29. A device as recited in claim 28 including in addition

means for causing said clamp means to so engage said end portions of said first and said second optical fibers when said first and said second elements are in said mated position,

and for causing said clamp means to release said end portions of said first and said second optical fibers when said first and said second elements are relatively moved away from said mated position to said separated condition.

30. A device as recited in claim 28 in which said means for causing said clamp means to so release said end portions of said first and said second optical fibers includes spring means engaging said first element and said clamp means, and biasing said clamp means away from said inclined surface.

31. A device as recited in claim 28 in which said clamp means includes a plurality of ridges thereon, said ridges extending into said grooves and engaging said end portions of said first and second optical fibers when said first and said second elements are in said mated position.

32. A device as recited in claim 28 including

means on said first element holding said clamp means thereto,

and cam means on said second element for engaging said clamp means and moving the same into engagement with said end portions of said first and said second optical fibers when said first and said second elements are moved from a separated condition to said mated position.

33. A device as recited in claim 32 in which said second element includes a tubular shell having a forward end, said shell having an outwardly flaring inner surface at said forward end providing said cam means for engaging said clamp means.